asp.net 初级入门学习之ATM
这不， 看到这个14：00， 就想起昨晚整到凌晨才把这个ATM写完， 提笔的有点晚，不过， 基本上还是完成了。
本次博文的目的是把刚学的asp.net基础知识再巩固下。若有雷同，纯属偶合~~~
开发环境：VS2013， 开发平台：windows8.1， 使用数据库版本：Access 2010
ATM的效果图：
界面做的简单了点儿， 但是基本上是实现了ATM的基本功能的
但是笔者 指出一点： 笔者并没有做的像ATM那样，每次取钱或这存钱均为100的整数倍， 当时在做的时候， 想到，不过是加上限制条件，不过笔者有点困，就没做啦~~~~
login.aspx.cs 登陆界面的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.OleDb;
namespace HR
{
public partial class login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void loginBtn_Click(object sender, EventArgs e)
{
string selectStr = "select * from login where 账户 = '"+AccountBox.Text+"' and 密码 = '"+KeyBox.Text+"'";
DataSet ds = AccessHelper.dataSet(selectStr);
if (ds.Tables[0].Rows.Count > 0)
{
///---session 保存登录信息
Session["userName"] = AccountBox.Text;
Session["key"] = KeyBox.Text;
Response.Redirect("index.aspx");
}
else
{
Response.Write("<script>alert('用户名或者密码错误')</script>");
AccountBox.Text = "";
KeyBox.Text = "";
}
}
}
}
index.aspx.cs 主界面代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb;
using System.Data;
namespace HR
{
public partial class index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
///---先判断是否登录账户
if (Session["userName"] != null && Session["key"] != null)
{
Account_CountLabel.Visible = false;
}
else
{
///--跳转到 登录界面
Response.Redirect("login.aspx");
}
}
/// <summary>
/// ---注销， 直接返回到登录界面, 清空： session 内的 内容
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void logOffBtn_Click(object sender, EventArgs e)
{
Session["userName"] = "";
Session["key"] = "";
Response.Redirect("login.aspx");
}
/// <summary>
/// ---_取钱按钮消息事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GetBtn_Click(object sender, EventArgs e)
{
Response.Redirect("GetMoney.aspx");
}
/// <summary>
/// ----显示余额按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Account_CountBtn_Click(object sender, EventArgs e)
{
DataSet ds = AccessHelper.dataSet("select * from Account");
Account_Label.Text += ds.Tables[0].Rows[0][0].ToString();
AccountName_Label.Text += ds.Tables[0].Rows[0][1].ToString();
Account_CountLabel.Text += ds.Tables[0].Rows[0][2].ToString();
Account_CountLabel.Visible = true;
///--禁用按钮 ： 显示余额
Account_CountBtn.Enabled = false;
}
/// <summary>
/// --存钱按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void saveBtn_Click(object sender, EventArgs e)
{
Response.Redirect("saveMoney.aspx");
}
}
}
取钱页面：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb;
using System.Data;
namespace HR
{
public partial class GetMoney : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Session["userName"] != null && Session["key"] != null)
{
DataSet ds = AccessHelper.dataSet("select * from Account");
///--显示余额
Label1.Text += ds.Tables[0].Rows[0][2];
}
else
{
///--跳转到 登录界面
Response.Redirect("login.aspx");
}
}
protected void sureBtn_Click(object sender, EventArgs e)
{
if (money_NumBox.Text == "")
{
Response.Write("<script>alert('取款数不能为空')</script>");
}
else
{
//获取输入的取钱数目，
float tempF = float.Parse(money_NumBox.Text);
DataSet ds = AccessHelper.dataSet("select * from Account");
float allStr = float.Parse(ds.Tables[0].Rows[0][2].ToString()); // 所有额
///---取钱数<= 余额
if (tempF < allStr && tempF > 0)
{
///---计算余额
float restStr = allStr - tempF;
///----更新数据库操作
string upDateStr = "update Account set 账户 = '" + Session["userName"] + "' , 户主 = '" + ds.Tables[0].Rows[0][1].ToString() + "' , 余额 = '" + restStr.ToString() + "' ";
AccessHelper.excuteSql(upDateStr);
///---提示：取走现金
Response.Write("<script>alert('请取走您的现金， 注意财产安全')</script>");
DataSet ds1 = AccessHelper.dataSet("select * from Account");
Label1.Text = "您的余额：" + ds1.Tables[0].Rows[0][2].ToString();
///---清空输入框内的数据
money_NumBox.Text = "";
}
else
{
///--取款失败
Response.Write("<script>alert('取款失败，输入的数据非法')</script>");
///---清空输入框
money_NumBox.Text = "";
}
}
}
/// <summary>
/// -返回到主页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void BackBtn_Click(object sender, EventArgs e)
{
Response.Redirect("index.aspx");
}
}
}
存款界面的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.OleDb;
namespace HR
{
public partial class saveMoney : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Session["userName"] != null && Session["key"] != null)
{
///--加载余额
DataSet ds = AccessHelper.dataSet("select * from Account");
Label1.Text += ds.Tables[0].Rows[0][2].ToString();
}
else
{
///--跳转到 登录界面
Response.Redirect("login.aspx");
}
}
/// <summary>
/// ---返回到主页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void BackBtn_Click(object sender, EventArgs e)
{
Response.Redirect("index.aspx");
}
/// <summary>
/// ---确定存钱按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void saveBtn_Click(object sender, EventArgs e)
{
if (saveMoneyBox.Text == "" || float.Parse(saveMoneyBox.Text) < 0)
{
///---提示存钱失败
Response.Write("<script>alert('存钱失败，存钱数不正确')</script>");
}
else
{
///---输入的存款数为正数
//获取输入的取钱数目，
float tempF = float.Parse(saveMoneyBox.Text);
DataSet ds = AccessHelper.dataSet("select * from Account");
float allStr = float.Parse(ds.Tables[0].Rows[0][2].ToString()); // 所有额
///---取钱数<= 余额
if (tempF > 0)
{
///---计算余额
float restStr = allStr + tempF;
///----更新数据库操作
string upDateStr = "update Account set 账户 = '" + Session["userName"] + "' , 户主 = '" + ds.Tables[0].Rows[0][1].ToString() + "' , 余额 = '" + restStr.ToString() + "' ";
AccessHelper.excuteSql(upDateStr);
///---提示：取走现金
Response.Write("<script>alert('存款成功')</script>");
///---更新金额提示label
DataSet ds1 = AccessHelper.dataSet("select * from Account");
Label1.Text = "您的余额：" + ds1.Tables[0].Rows[0][2].ToString();
///---清空输入框内的数据
saveMoneyBox.Text = "";
}
else
{
///--取款失败
Response.Write("<script>alert('取款失败，输入的数据非法')</script>");
///---清空输入框
saveMoneyBox.Text = "";
}
}
}
}
}
提示：
笔者代码里面使用一个名为AccessHelper的类， 这里面封装了数据库的一些常用操作。稍加修改， 这个类可以适用于SQL。之前的博文也说到过这个AccessHelper类，
这里，我把这个类的代码还是贴出来。
============================ AccessHelper 类 源码======================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.Web;
public class AccessHelper
{
protected static OleDbConnection conn = new OleDbConnection();
protected static OleDbCommand comm = new OleDbCommand();
public AccessHelper()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 打开数据库
/// </summary>
private static void openConnection()
{
if (conn.State == ConnectionState.Closed)
{
conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source= " + HttpContext.Current.Server.MapPath("1.accdb") + " ";
comm.Connection = conn;
try
{
conn.Open();
}
catch (Exception e)
{ throw new Exception(e.Message); }
}
}
/// <summary>
/// 关闭数据库
/// </summary>
private static void closeConnection()
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn.Dispose();
comm.Dispose();
}
}
/// <summary>
/// 执行sql语句
/// </summary>
/// <param name="sqlstr"></param>
public static void excuteSql(string sqlstr)
{
try
{
openConnection();
comm.CommandType = CommandType.Text;
comm.CommandText = sqlstr;
comm.ExecuteNonQuery();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
finally
{ closeConnection(); }
}
/// <summary>
/// 返回指定sql语句的OleDbDataReader对象，使用时请注意关闭这个对象。
/// </summary>
/// <param name="sqlstr"></param>
/// <returns></returns>
public static OleDbDataReader dataReader(string sqlstr)
{
OleDbDataReader dr = null;
try
{
openConnection();
comm.CommandText = sqlstr;
comm.CommandType = CommandType.Text;
dr = comm.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
try
{
dr.Close();
closeConnection();
}
catch { }
}
return dr;
}
/// <summary>
/// 返回指定sql语句的OleDbDataReader对象,使用时请注意关闭
/// </summary>
/// <param name="sqlstr"></param>
/// <param name="dr"></param>
public static void dataReader(string sqlstr, ref OleDbDataReader dr)
{
try
{
openConnection();
comm.CommandText = sqlstr;
comm.CommandType = CommandType.Text;
dr = comm.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
try
{
if (dr != null && !dr.IsClosed)
dr.Close();
}
catch
{
}
finally
{
closeConnection();
}
}
}
/// <summary>
/// 返回指定sql语句的dataset
/// </summary>
/// <param name="sqlstr"></param>
/// <returns></returns>
public static DataSet dataSet(string sqlstr)
{
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter();
try
{
openConnection();
comm.CommandType = CommandType.Text;
comm.CommandText = sqlstr;
da.SelectCommand = comm;
da.Fill(ds);
}
catch (Exception e)
{
throw new Exception(e.Message);
}
finally
{
closeConnection();
}
return ds;
}
/// <summary>
/// 返回指定sql语句的dataset
/// </summary>
/// <param name="sqlstr"></param>
/// <param name="ds"></param>
public static void dataSet(string sqlstr, ref DataSet ds)
{
OleDbDataAdapter da = new OleDbDataAdapter();
try
{
openConnection();
comm.CommandType = CommandType.Text;
comm.CommandText = sqlstr;
da.SelectCommand = comm;
da.Fill(ds);
}
catch (Exception e)
{
throw new Exception(e.Message);
}
finally
{
closeConnection();
}
}
/// <summary>
/// 返回指定sql语句的datatable
/// </summary>
/// <param name="sqlstr"></param>
/// <returns></returns>
public static DataTable dataTable(string sqlstr)
{
DataTable dt = new DataTable();
OleDbDataAdapter da = new OleDbDataAdapter();
try
{
openConnection();
comm.CommandType = CommandType.Text;
comm.CommandText = sqlstr;
da.SelectCommand = comm;
da.Fill(dt);
}
catch (Exception e)
{
throw new Exception(e.Message);
}
finally
{
closeConnection();
}
return dt;
}
/// <summary>
/// 返回指定sql语句的datatable
/// </summary>
/// <param name="sqlstr"></param>
/// <param name="dt"></param>
public static void dataTable(string sqlstr, ref DataTable dt)
{
OleDbDataAdapter da = new OleDbDataAdapter();
try
{
openConnection();
comm.CommandType = CommandType.Text;
comm.CommandText = sqlstr;
da.SelectCommand = comm;
da.Fill(dt);
}
catch (Exception e)
{
throw new Exception(e.Message);
}
finally
{
closeConnection();
}
}
/// <summary>
/// 返回指定sql语句的dataview
/// </summary>
/// <param name="sqlstr"></param>
/// <returns></returns>
public static DataView dataView(string sqlstr)
{
OleDbDataAdapter da = new OleDbDataAdapter();
DataView dv = new DataView();
DataSet ds = new DataSet();
try
{
openConnection();
comm.CommandType = CommandType.Text;
comm.CommandText = sqlstr;
da.SelectCommand = comm;
da.Fill(ds);
dv = ds.Tables[0].DefaultView;
}
catch (Exception e)
{
throw new Exception(e.Message);
}
finally
{
closeConnection();
}
return dv;
}
}
=====================AccessHelper 类代码 至此 ======================
这不，代码都贴出来了，相信，消化它，剩下的就是时间问题啦~~~~~~
这里 是本次练手源码下载地址~~~~~~~